Mounting for telescopic sights



March 5, 1957 Filed April 27, 1954 J. F. DAHLBERG SRH 'ROOM 2Sheets-Sheet l March 5, 1957 J. F. DAHLBERG 2,783,539

MOUNTING FOR TELEscoPIc slams Filed April 27, 1954 2 Sheets-Sheet 2United States VO MOUNTING FOR TELESCOPIC SIGHTS Jonas Folke Dahlberg,Seattle, Wash.

Application April 27, 1954, Serial No. 425,963

Claims. (Cl. 33-56) This invention relates to gun sights, andparticularly to a mounting for telescopic 'sights of the type adaptedfor use on rifles, Shotguns and other similar small arms. It 'is anobject of the invention to provide a sight of this character havingfeatures of mounting and adjustability by means of which extremelyaccurate setting and shooting results will be obtained.

It is an object of the invention to provide a telescopic sight mountingby means Aof which the 4sight can be easily attached to or readilydetached from the gun; by means of which elevating and lateraladjustments of the sight are easily and accurately secured, to therebysecure exceptional accuracy in shooting.

It is an object of the invention to provide a mounting means ofrelatively simple construction and which can be readily attached tostandard guns, and having numerous other advantages apparent to thoseskilled in this art.

. With these and other objects lto be hereinafter set forth in view, Ihave devised the arrangement of parts to be described and moreparticularly pointed out in the claims appended hereto.

In the accompanying drawings, wherein an illustrative embodiment of theinvention is disclosed, Fig. l is a side elevational view ofthe improvedsight mounting, showing the same applied to a gun;

Fig. 2 is a vertical sectional view of the rear portion of the mounting,lshown in yan enlarged scale;

Fig. 3 is a vertical sectional view through the front portion of themounting;

Fig. 4 is la sectional view, taken at right angles to that of Fig. 3 andsubstantially on the line 4 4 of Fig. 3, look` ing in the direction ofthe arrows;

Y Fig. 5 is a top plan view of the saddle or seat for the rear mounting;.A

Fig. 6 is a sectional view, ,taken substantially on the line 6 6 of Fig.5, looking in the direction of the arrows;

Fig. 7 is a side elevationf, with ia portion shown in section, of theholder for the telescopic sight;

Fig. 8 is a view of the separated elements which comprise the rearportion of themounting;

Fig. 9 is a top plan view of the clamp employed in the rear portion ofthe mounting;

Fig. 10 is a top plan view of the threadedv plug;

Fig. 11 is a top plan view of the leaf spring which is located 'aboveand has a part in engagement with the top of the threaded plug;

Fig. 12 is a side elevational view, with a portion in section, of twoparts of the frontportion of the mounting;

Fig. 13 is a perspective view of'one of the lugs for the support of thetelescopic sight;

Fig. 14 is a face View of the clamping lug employed at the forward endof the front mounting, and

Fig. 15 is a view looking at the under side of the main element of thefront mounting.

ln the drawing, 1 indicates a portion of a gun or rifle upon which theimproved telescopic sight mounting is ICC fitted. Fitted over the barrelis a mounting member 2 upon which is detachably fitted a saddle or seat3. The Asaddle or seat 3 is concaved on its under surface to enable thesame to conform to the curvature of a part of the mounting member 2 andthe seat 3 is apertured as at 4 to receive a fastening screw shown -at 5in Fig. 2, `and which is threadably received in a complementary holeprovided in 'the mounting member 2. Provided in the saddle or seat 3 isa keyhole-shaped opening 6 which registers with a similar opening, notshown, but formed in the top of the mounting member 2, when the 'saddleis fitted over the mounting member 2 and is Isecured thereto by means ofthe screw 5.

At 7 is shown an externallythreaded plug member which is formed on itslower end with a shank 8 integrally provided with a slotted head 9 bymeans of which the plug is rotatively adjusted. The shank 8 normallyfits through the keyhole slot 6 and through the registered keyhole slotin the mounting member 2, and when the device is in its operativeposition, 'as shown in Figs. 1 and 2, the shank extends through thenarrow part of the slot 6 thus coupling the plug 7 to the saddle or seat3. When the plug member 7 is to be adjusted, the sight is shiftedrearwardly, as will be explained, until the lshank 8 can be raised upand out through the enlarged part of the keyhole slot. Aninternally-threaded, knurled locking ring 10 is threadable on the plug 7`and maintains the same in any desired position of adjustment as will behereinafter explained.

At 11 is shown the holder for the telescopic Isight 12. The holder 11 ispreferably composed of a substantially C-shaped housing which fitsaround the telescopic sight between its ends and is preferably, but notnecessarily, composed of sheet metal, reinforced or -stiffenedat itslower edges by the upturned flanges 13. The central pory tion of thebody of the telescopic sight 12 rests within the holder 11 by beingsupport-ed upon the triangulated lugs Ishown at 14 and located withinthe holder 11. Each of the lugs 14 is provided with a flange 15 whichfits behind one or 'the other of the anges 13 formed onthe sight holder11, as seen in Fig. 4. One of the elemenis of the rear mounting for thetelescopic sight consists of the ring-clamp 17, shown in Figs. 8 Iand 9.Said clamp is provided with an internally-threaded opening 18 which isthreadable on the plug 7, and the spaced jaws 19. Extending through thejaws 19 is the threaded opening 20 which receives a threaded screw 21 tothereby draw the jaws toward one another 'and hold the clamp 17 clampAingly upon the threaded plug 7 as clearly seen in Fig. 2.

Adjacent to its forward end, the lclamp 17 is formed with the 'threadedopening 22 which receives two screws 23. These two screws enter theopening 22 from opposite Isides of the clamp, similar to the manner inwhich the screws 36 and 37 enter the part 31 shown in Fig. 4. It willbe'noted that the sight holder 11 is formed adjacent to its lower edgewith the openings 24, and the screws 23 pass through said openings asWell as through holes 16 provided in two of the lugs 14. Thisarrangement is such `that the clamp 17 is fastened in the holder 11 andis threadably and adjustably attached to the same as well as to theadjustable plug 7.

The top of the plug 7 is provided with a depression 25 (Fig. 8) andmounted in the opening 18 of the clamp 17.'

lower the sight as required. When the required vertical adjustment isobtained the mounting is locked by tightens.

ing the clamping screw 21 and turning down the locking ring 10. Alateral adjustment is obtained by tightening or loosening the screws 23or either of them as required and calibrations 30 may be provded on thesurface of the holder 11 adjacent to the heads of these screws toindicate lateral adjustments. The resilient finger 27 on the platespring 26 provides for a clicking sound when the plug 7 is rotatedthereby guiding the user and audibly indicating the extent of verticaladjustment.

The front mounting for `the telescopi-c sight includes a front mountingbar 31 which is formed with a hook portion 32 lat one end, which portionhas a lip 34 fitting into a recess 33 formed in a part of the mountingmember 2, as shown in Fig. 3. At this end of the mounting bar is formeda transverse, internally-threaded opening 35 adapted for the receptionof the two screws shown respectively at 36 and 37 in Fig. 4. Thesescrews pass through the holes 38 formed in the anged edge portions f theholder 11 and also through the holes 16 in two of the lugs 14, asclearly seen in Fig. 4. Calibrations 30a may be provided on the faces ofthe holder 11 as shown in Fig. 1 to guide in the 4adjustment ofthescrews 36 and-37. At its forward end the bar 31 is formed with alongitudinally-extending, threaded bore 39 which receives a threadedscrew 40 carrying a knob or finger-piece 41. The screw passes through ahole 47 in a lug 42 which is interposed 'between the knob and the end ofthe mounting bar 31. Said lug 42 is formed with a tin or rib 43 whichtakes under the lower edge of the `bar 31 so that said lug is preventedfrom being rotated when the knob and screw 40 thereon is rotated. Theinclination or taper on the n 43 acts as `a cam to raise or lower theforward end of the sight 12 when the knob 41 is turned as required fordesirable height adjustment. The inclined surface 44 formed on the lug42 engages against a part of the mounting member 2, as shown at 46 inFig. 1, so that the mounting member 2 is clampingly engaged by 'the bar31 and the co-operating lug 42. The element 42 is thus a clamping-pieceand a raising and lowering cam member for the forward end of the sight.

From he foregoing, the operation of the device will be readilyunderstood. By raising ror lowering the plug 7 by means of a screwdriver or other tool inserted in slot 9, the rear end of the sight canbe readily adjusted in elevation, and the plug then locked in positionby tightening the lscrew 21 and threading down locking ring 10.

This adjustment is made by detaching the sight holder from the gun whichis done by loosening screw 40 to an extent sufficient to enable thesight holder to be slid rearwardly along its mounting 2 until shank 8reaches the larger portion of the keyhole slot so that the shank willpass upwardly therethrough and become accessible for adjustment. Inreplacing the sight holder the shank is fitted through the large end ofthe keyhole slot 6 and the ysight holder is pushed forward until theshank enters the narrow portion of said slot. This will bring the lip 34into the recess 35 and when screw 40 is tightened the sight holder willbe held in position. A rear lateral adjustment `of the sight is attainedby tightening or loosening operation of the screws 23 or eithe'r of themas required. The front of the sight is laterally adjusted by tighteningone of the screws 36 or 37 while 'the other is loosened and elevation atthe front of the sight can be had by tightening or loosening of theknob. 41.

While the device is shown for use in holding a telescopic sight, suchtype of sight can vbe readily removed and the rear mounting used'forholding a peep sight of damping @la the type shown for example, in my en-pending applicaf tion Seri-al No. 300,180 filed July 22, 1952, andwithout material change in the, rear mounting.

Having described a single embodiment of the invention, it is obviousthat the same is not to be Irestricted thereto, but is broad enough Itocover all structures coming within the scope of the annexed claim-s.

What I claim is:

l. A mounting for gun sights comprising a saddle titted above a gunbarrel, the saddle being formed with a keyhole opening, a threaded plughaving a shank fitted in said keyholeopening, said shank having aslotted vhead by means of which the shank is rotated, a locking ringthreadably fitted on the plug, a split clamping ring threadably fittedon the plug, means for tightening the clamping ring on the plug, atelescopic sight holder attached to the clamp by a pair of screws whichare independently adjustable through the clamping ring to there bylaterally adjust the/sight holder relatively to said y2.251 mounting forgun sights comprising, a seat tting over a gun barrel, a threaded memberrotatable in` x the seat, a clamp fitted on the threaded member, thevthreaded member being threadably adjustable through' the clamp, a sightholder carried by the clamp, fasteningA means attaching the holder tothe clamp, said fastening means constituting adjustment elements bywhich thc sight holder is adjustmrgnsversely of the clamp.

3. A mounting for gun sights as provided for in claim 2, wherein theclamp holds a spring nger disposed within it, said spring finger beingin contact with the top of the threaded member, the top of the threadedmember being serrated gioni), 'v by the spring finger when the threadedmember is rotatably adjusted within the clamp.

4. A mounting for gun sights comprising, a saddle fitted above a gunbarrel, a threaded plug rotatively anddetachably connected to saidsaddle, a threaded locking ring threadable on the plug, a split clampingring threadable on the plug above the locking ring, a sight holdermounted above the plug, means for attaching the sight holder to theclamping ring, said means consistingvof screws entering the clampingring and adjustable there through to permit lateral adjustment of thesight holder relatively to the clamping ring.

5. A mounting for gun sights comprising, a housing fitted around andembracing a telescopic sight, said housing being substantially C-shapedin cross section, supports within the housing upon which the sight isrested, mounting means for the rear portion of the housing comprising aclamp adjustably attached to the housing by screws which, by theiradjustment relatively to the hous` ing and clamp, permit lateraladjustment of the housing relatively to said clamp, a saddle mounted onthe gun, an adjustable threaded plug extending through the saddle andbeing vthreadably received in the clamp, and

a locking ring adjustable on the plug between the clamp and saddle.

References Cited in the le of this patent UNITED STATES PATENTS

